Press Release

GCAL and AGL Agree with Malca-Amit to Use Worldwide Security Services for Submissions and Take-in Windows

GCAL and AGL have agreed with Malca-Amit USA, LLC to use the
worldwide delivery system of Malca-Amit to enhance the international submission operations of these labs.

NEW YORK, NY - March 28, 2007- Gem Certification & Assurance Lab (GCAL) and American Gemological Laboratories
(AGL) have agreed with Malca-Amit USA, LLC to use the worldwide delivery system of Malca-Amit to enhance
the international submission operations of these labs. Malca-Amit
(www.malcaamit.com) operates high value security services in 23
countries with 53 offices. Initially, Malca-Amit will be accepting diamond and colored gemstone
submissions for authentication and grading in 18 offices in Europe, the Middle East and Asia.

"We believe this is a key relationship for our diamond services since these markets are worldwide in scope,"
explained Don Palmieri, President of Gem Certification & Assurance Lab. "By using the bricks and mortar
of Malca-Amit, a highly respected security service in the jewelry markets, we now are better able to
extend our reach into the important diamond centers of the world."

Some of the diamond and colored gemstone markets to be served directly by GCAL and AGL through Malca-Amit
include Antwerp, Brussels, Bangkok, Dubai, Geneva, Hong Kong, London, Mumbai, Surat, Tel Aviv, Toronto
and Zurich.

“With the international systems of Malca-Amit, which often include door-to-door service, we will be able to
offer AGL authentication and grading services as close and convenient as the lobby of the gemstone dealers’
offices,” stated C.R. “Cap” Beesley, President of American Gemological Laboratories. “This is part of our
continuing development with international dealers and the manufacturing community so that we can easily include
third party certification along with colored gemstone jewelry that the consumer receives, thereby increasing
confidence in the retail purchase and enhancing the opportunity for additional purchases in the future.”

“We are pleased to provide this service to the divisions of Collectors Universe and we anticipate a long and
fruitful relationship,” said Shlomo Malka, Vice President of Malca-Amit. “We believe that with the expansion of
their operations and our multi-national network of offices will provide the best opportunity to meet the needs of
their clients and customers.”

About American Gemological Laboratories
Founded in 1977 by C.R. “Cap” Beesley, American Gemological Laboratories (AGL) has been a pioneer as the first
gemological laboratory to offer colored stone grading reports and comprehensive gemological origin reports. AGL is
also the Official Colored Gemstone Laboratory of the Fine Jewelry CEO Summit and the JCK Las Vegas and JCK
Invitational shows, as well as the 2007 Platinum Sponsor of the ICA (International Colored Gemstone Association)
World Congress in Dubai.

About Gem Certification and Assurance Lab
Gem Certification & Assurance Lab (GCAL) is a subsidiary of Collectors Universe, Inc. In
addition to being the 2007 Official Diamond Grading Laboratory of the JA NY Winter Show, GCAL
is also the Official Diamond Grading Laboratory of the 2007 Fine Jewelry CEO Summit and the
2007 JCK Las Vegas and JCK Invitational Shows, as well as the Platinum Sponsor of the ICA
(International Colored Gemstone Association) 2007 World Congress in Dubai. On the Internet:
www.gemfacts.com.

About Collectors Universe
Collectors Universe, Inc. is a leading provider of value added services to the high-value collectibles,
diamond and colored gemstone markets, with the Company’s common stock traded on the NASDAQ Global Market
under the symbol CLCT. For the most recent fiscal year, CLCT authenticated and graded over 3 million items
valued at just less than $2 billion.